Question

One side of a triangle

is three feet less than
the first side. The third
side is five feet less
than twice the first. The
perimeter is 20 feet.
Find the length of the
three sides of the
triangle.

Answer 1

4, 7, 9 units

Explanation:

let 'x' = length of 1st side

let 'x-3' = 2nd side

let '2x-5' = 3rd side

perimeter is sum of all sides so we can use this equation to solve for 'x':

x + x-3 + 2x-5 = 20

4x - 8 = 20

4x = 28

x = 7

7-3 = 4

2(7)-5 = 9